Out on the First Hand of the Tournament

To cut the story short, on the first hand of the tournament Bob is dealt with pocket 7s. He raise three times on the blind and two players called it. The flop was 7-9-9. Bob likes the flop and raised again. One player folded while the other one called. The turn is a K. Bob made a minimum bet and the other player checked. The river was 7. Bob went all in. His opponent called. While Bob was already reeling in all the chips, his opponent showed his pocket 9s and ousted me from the tournament.